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  1. #1
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    Jul 2006
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    Canon-Kenko-Soligor Teleconverters

    I was planning on getting the Canon 1.4x teleconverter for use with the 70-200 f/2.8 IS but was reading the $6500 thread and saw that the Kenko and Soligor both came up as contendors.

    How many stops do you loose with the 1.7x v. 1.4x?
    Is it worth owning one of each or is that a poor way to spend budget?
    Which gives the best optical quality?
    Ultimately, which would go best with the 30D, 17-55, and 70-200 f/2.8 IS?


    *Canon EF 1.4x Extender $284.95

    *Soligor 1.7x C/D4 DG Teleconverter

    Tamron SP AF Pro1.4x TC

    *Kenko 1.4x Teleplus Pro 300 DG Teleconverter for Canon EOS $195
    Kenko 2.0x Teleplus Pro 300 DG Teleconverter for Canon EOS $ 214.95
    Kenko 3.0x Teleplus Pro 300 DG Teleconverter for Canon EOS $ 224.95

    Sigma 1.4x DG EX APO Teleconverter $169

  2. #2
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    Jul 2005
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    Soligor is only available directly from Soligor in germany to US customers.
    They are of great quality though, the cheaper series of theirs. The more expensive ones are not as good.

    You lose 1 f-stop with an 1.4x convertor.
    You lose 1.5 f-stops with the 1.7x ones.
    You lose 2 f-stops with a 2x one.

    cdi tried a 1.5x Kenko (cheap version) which also performed quite good I think.

    Ones I would consider:
    Canon 1.4x extender
    Kenko 1.5x (cheap, can't really go wrong)
    Soligor 1.7x C/D 4 AF
    Soligor 2x C/D (7? not sure) AF
    Canon 2x extender.

    Note that one member encountered a problem with his EF 70-200 IS f2.8 L with the 1.7x Soligor, and it got never cleared up why the lens was giving the AF of the camera problems with the loss of 1.5 f-stops in light. It probably was just his lens sample, but like I said it was never cleared up.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  3. #3
    Join Date
    Nov 2004
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    1,807
    extenders aren't really meant for use on non-tele lenses. results will vary depending on the combo used

    the canon extenders have a front protrusion so it'll only fit on specific lenses. i think sigma is designed for specific use as well, though not totally sure about that one

    i've only used the canon so can't say much in comparison. i don't think many people have used more than one so it's gonna be hard to find comparisons
    Last edited by ReF; 09-11-2006 at 04:29 AM.
    canon 17-40 L, 70-200 f2.8 L, 400 f5.6 L, 50 f1.4 & f1.8, 1.4x TC, sigma 15 f2.8 fisheye, flash 500 DG Super, kenko extension tubes

    note to self: don't participate in sad, silly threads unless you're looking for sad, silly responses.

    "anti-BS filter" (from andy): http://dcresource.com/forums/showpos...94&postcount=4

  4. #4
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    I just found this note on the $87 Kenko 1.5x DG AF Converter
    "Note: Not compatible with the Canon Digital-only EF-S lenses, e.g. 18-55 f/3.5-5.6, 17-85 f/4-5.6, 60 f/2.8 macro"

    The Kenko 1.4x Teleplus Pro 300 DG also has a note
    "Note: Not compatible with Canon EF-S lenses, e.g. 18-55mm, 17-85mm."

  5. #5
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    Quote Originally Posted by ReF
    i don't think many people have used more than one so it's gonna be hard to find comparisons
    Considering people are putting these telecoverters some of their most expensive glass I'm really surprised that none of the sites has done extensive testing on their optics, etc.

  6. #6
    Join Date
    Jul 2005
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    The reason the convertors are not compatible with EF-S lenses is that these lenses have a back element that sits closer to the sensor than with EF lenses.
    But there is no EF-S lens that would make you want to use TC, except if you had a 60mm macro.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  7. #7
    Join Date
    Nov 2004
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    1,807
    Quote Originally Posted by RichNY
    Considering people are putting these telecoverters some of their most expensive glass I'm really surprised that none of the sites has done extensive testing on their optics, etc.
    i'm surprised too. not enough demand?

    btw, i think cdi said something about the 1.5x tamron causing the 70-200's AF to occilate if the focus distance is too far off to begin with. not really sure - you'll have to hear it from him. never seen this with the canon 1.4x + 70-200 f2.8 or f4 version though. otherwise, it's supposed to be pretty good optically for next to $ nothing $
    Last edited by ReF; 09-11-2006 at 06:01 AM.
    canon 17-40 L, 70-200 f2.8 L, 400 f5.6 L, 50 f1.4 & f1.8, 1.4x TC, sigma 15 f2.8 fisheye, flash 500 DG Super, kenko extension tubes

    note to self: don't participate in sad, silly threads unless you're looking for sad, silly responses.

    "anti-BS filter" (from andy): http://dcresource.com/forums/showpos...94&postcount=4

  8. #8
    Join Date
    Dec 2004
    Location
    Los Angeles, CA
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    I've used the cheap Tamron 1.4X on my Canon 70-200 F4 L. Works very well. However on a Canon 70-300 IS, the lens went crazy. Couldn't focus consistently with the teleconverter on it. Based on coldy's reviews, I would go with the Soligor 1.7X (I would have bought one if I didn't already have the Tamron.)
    Canon A720 IS, 40D w/ BG-E2N, 28 1.8, 50 1.4, Sigma 70 2.8 macro, 17-40 F4 L, 24-105 F4 L IS, 70-200 F4 L IS, 430 EX, Kenko 2X TC & Ext Tubes, AB strobes and more...
    View my photo galleries here: imageevent.com/24peter

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